I can guarantee you there were plenty of people on my Quantum sailing the week of June 20th who had covid (judging by the coughing) and weren't reporting it. A lot of it is on the honor system. We didn't test positive until the night we got home, which means we were probably passing it around the ship without knowing it. I tested negative a couple days before when I had a scratchy throat. There is no clear answer for you. People who say #'s on ships are low, no...reported #'s are low. Again, I was negative on day 5 and then flew home and tested on which was day 7 and was positive. So I had it on the ship but am not included in their numbers and neither are any people who ignored their symptoms. Cases everywhere seem to be going up everywhere. So enjoy the trip and try to relax and take the precautions you feel comfortable with. I agree with taking some at-home tests with you and then make your decision. Had I tested positive on the ship at the time, I probably would have said something but looking back now and hearing some of the horror stories of people dealing with quarantine and getting off the ship, I'm not sure. To be fair, some people had great experiences too but I always expect the worst. All these rules that cruise lines put in, won't do much if everyone isn't following them. So if you get it and feel like following the rules, just remember there will be plenty of people who won't be.